Radiator cap



K. E. STANT Dec. 6, 1927.

RADIATOR CAP Filed Feb. 15. 1926 INVENTOR. KYLE E. 577M 77 65 fixed relative thereto, would top of the filler, whereby it wouldibe torn- Patented 'Dec. 6, 1927.

man. steam, or oommnsvrnrn; INDIANA.

momma on.

Application filed February 15, 1988. Serial No. 88,354.

This invention pertains to screw threaded closures of Various types, and particularly gr to a radiator cap for closing the filler open-- ing at the top of an automobile radiator.

The principal object of the invention is to provide a cap of the character and for the purpose above mentioned, which will be of a simple and economical character having extreme effectiveness in mounting and long wear.

The invention contemplates the provls on of a cap which may have any ornamental mounting thereon, for closing the filler spout of a radiator, the cap being provided with the usual screw threads for screwing the same in position, but having mounted thereon a spring disk with a suitable gasket which will bear against the top edge of the filler spout as the capis screwed into position for exerting a spring pressure against the threads of the cap, thereby not only holding the cap in properly adjusted position, but "formin an efiecti've seal about the upper edge of the filler spout.

The advantages of the cap-will appear from a consideration of the construction as further described, but attention ma be called to the fact that .by reason of the spring disk, the cap automatically aligns it- 80- self so that the ornamental parts will be in proper position withrespect to the radiator, and when the cap is screwed into position, there will at all times be a spring tension holding it firml in proper alignment.

85 Furthermore, the. dis may be so made and arranged as to permit the cap to'be in aligieied position upon "a predetermined num r of revolutions. Thus permanent ali ment of the cap may be maintained regar ess of possible wear of the threads or the gasket.

Another feature of the invention resides in "the mounting of the springdisk within the cap so that it is rotatable with respect thereto. This prevents scraping of .the gasket mounted on the disk over the top of the filler spout; When the gasket is brought into contact with the top of the filler spout, it remainsstationarytherewith during the Y continued rotation of the cap. This. er-

mits the use of a hard composition of cheaper material than the usual so rubber gasket'or cork heretofore employed. In the. prior structures, as the cap is rotated into tightening position, the gasket belng scrape over the respect to of lugs 21 whic or worn so as to be mutilated and disinteated in a comparatively short time.

The full nature of the invention will be understood from the accompanying drawlngs and the following description and claims:

In the drawings, Fi ure 1 is a cross sect1on through the cap. ig. 2 is a plan view looklng upwardly into the interior thereof from the underside.

In the drawings there is shown the usual screw cap 10 employed to close the filler spout 11 of an automobile radiator 12. Said cap, as is usually constructed, is provided with outwardly extending ornamental arms 13, and an ornamental mounting, motometer or the like 14.

The cap is screw threaded on the interior so as to screw upon the exterior screw threads of the filler spout in the usual manner. as illustrated herein, and is provided with a downwardly extending central tubular boss 15 mounted in the center thereof and extending downwardly from the top. The

ornamental mounting or motometer is mounted within the tubular boss by causing the shank thereof to extend through a corresponding opening in the cap through said boss and receive the usual nut 16 for securing it in fixedposition therein.

Mounted about the lower end of the boss there is a dish-shaped metalspring disk. 17 which in normal position is concave] with its lower side or the open end of the cap. Immediately above the disk there is a hard composition gasket 18 formed of fibre or similar material and secured to the disk about its outer periphery on the underside thereof there is a large gasket 19 of the same material. The disk 17 and gasket 18 a are held in position by turning up the lower edge on the boss at 20, whereby it will be secured thereto, but will be loosely mounted so as to freely permit rotation of the disk with respect to the boss. Immediately above-the sprin disk 17 there is a plurality act as a stop for limiting the upward 'movement of i the disk if sufiicient pressure is applied thereto in screwing the cap in osition,

In operation, when the cap the spout, the'concave spring the medium of the gasket 19, engages the top edge of the spout. By reason of its engageme'nt therewith, its rotary movement wlth the cap is arrested and it remains stationary is screwed onto disk, through .disk is forced in contact with the spout while the cap is continued to be rotated thereabout. In screwing the cap further onto the spout, the upwardl against the spring tension thereof until t e cap is aligned in desired position with sufiicient pressure exerted by the spring tension of the disk, resulting in friction of the screw threads, to maintain it against radial movement, whereby it will remain in any desired position. The spring tension thus effected by the disk will so compress the gasket against the top edge of the spout as to effect a seal for preventing leakage around the screw threads. By reason of the extent of movement of the spring disk under tension, any irregularities or wear in the screw threads or ket will be compensated for without pro ucing any noticeable effect upon the firmness of the ea in aligned position. It will be noted that by reason of the relative rotation, which is permissible as between the disk and cap, that there would be no scraping of the gasket over the top edge of the spout, thus eliminating any appreciable wear thereof. By properly forming the spring disk with respect to the screw threads of the cap, the cap may be so arranged as to cause it to be aligned under sprin tension upon a predetermined number 0 revolutions, preferably one and one-half.

Whereas the invention has been above described with particular refemnce to a radia- P center, whereby 1 tor cap, it is obvious that the same may be employed with respect to all closures of this character, whether for hub caps or the like, whenever it may be desired to effect a s ring tension or resistance to the screw threa s, as well as effect a sealing about the upper edge thereof.

The invention claimed is:

The combination with a threaded radiator filler spout, of a closure ca therefor provided with screw threads a apted to screw on said s out, a projection extending downwardly rom said cap, a metallic spring disc, and means for sup orting and maintainin said disc on sai promotion adjacent t e end thereof so as to permit its free rotation but prevent movement lon 'tudinally of said projection at substantia 1y its the peripheral surface of said disc will edge of said s out for exerting a pressure an resistance between the respective screw threads so as to frictionall maintain said cap in adjusted position an seal said member with respect to said cap and filler spout when in position for preventing leakage, while permitting the free rotation of said cap without relative movement between said disc and spout, said pressure being dependent entirely upon the resiliency of said disc.

In. witness whereof, I have hereunto affixed my signature.

KYLE E. STANT.

e in position to engage the 

